nothing.

But I was reminded that:

From: The Rev Dodgson
ID: 2165763
Subject: re: today I learned
of Grete Hermann:

“She studied with Emmy Noether, and went on to work on the foundations of quantum mechanics with Weizsacker and Heisenberg as well as making many contributions in pure mathematics.

On reading von Neumann’s proof, she was not at all intimidated by his reputation in the way others were, and in 1935 she carefully and precisely pointed out its limitations. In fact, she did so rather more carefully and directly than Bell’s commentary thirty years later.

Nonetheless, her work was totally ignored for 30 years, and everyone continued to cite von Neumann’s proof as showing the general impossibility of hidden variables theories.

The history of QM might well have been quite different if people had paid attention to her.”

From: https://www.quora.com/Does-von-Neumanns-theorem-1932-about-the-absence-of-hidden-parameters-in-quantum-mechanics-imply-the-coincidence-of-model-and-reality

and TATE agrees.